Comparative Politics Codexery

Politics of the United States

Constitutional federal republic with a presidential system and two-party dominance.

Politics of the United States

The politics of the United States function within a framework of a constitutional federal republic with a presidential system. The three distinct branches—legislative, executive, and judicial—share powers, and the federal government shares sovereignty with state governments. American politics is dominated by two parties, the Democratic Party and the Republican Party, since the American Civil War.

The federal government is divided into an executive branch headed by the president, who serves as both head of state and head of government and is independent of the legislature; a bicameral legislative branch called Congress, composed of the House of Representatives and the Senate; and a judicial branch, consisting of the Supreme Court and lower federal courts, which interprets the Constitution and federal laws. This system is notable for its strong separation of powers, an upper legislative chamber with considerable authority, and a Supreme Court with broad influence, features that distinguish it from many other developed nations. The dominance of only two major parties is largely attributed to the first-past-the-post voting system used in most elections, which encourages strategic voting and discourages vote splitting, resulting in both parties containing multiple internal factions. Officials at all levels are popularly elected, except the president, who is chosen indirectly through the Electoral College. Almost all public officials are elected from single-member districts by winning a plurality of votes. Suffrage is nearly universal for citizens aged 18 and older, with some states restricting voting by registered felons.

Each of the 50 states has its own constitution, generally following the federal pattern, and possesses inherent powers to make laws on subjects not granted to the federal government or denied to the states, such as education, family law, contract law, and most crimes. State governments also have three branches: an executive branch headed by a popularly elected governor, a legislative body (bicameral except in Nebraska), and a judicial branch. At the local level, governments exist in counties or county-equivalents, and beneath them are municipalities, townships, school districts, and special districts.

System type
Constitutional federal republic with a presidential system
Branches of government
Three: legislative (Congress), executive (president), judicial (Supreme Court and lower federal courts)
Major political parties
Democratic Party and Republican Party
Head of state and government
President of the United States
Legislative body
Bicameral Congress (House of Representatives and Senate)
Voting system
Plurality-based first-past-the-post in single-member districts
Suffrage
Nearly universal for citizens 18 years and older, except registered felons in some states

Lore & Background

The federal government is divided into three branches as per the U.S. Constitution. The executive branch is headed by the president, who is elected indirectly through the Electoral College. Legislative power is vested in the two chambers of Congress: the Senate and the House of Representatives. The judicial branch, composed of the Supreme Court and lower federal courts, interprets the Constitution and federal laws. The federal entity created by the Constitution is the dominant feature of the American governmental system, with citizens also subject to state and local governments. Each of the 50 states has its own constitution modeled on the federal one, with an executive branch led by a popularly elected governor, a legislative body (bicameral except in Nebraska), and a judicial branch. At the local level, governments exist in counties, municipalities, townships, school districts, and special districts. American politics has been dominated since the Civil War by the Democratic and Republican parties, though other parties have fielded candidates. The Democratic Party generally supports left-leaning policies, while the Republican Party supports right-leaning ones. Neither party has a formal central organization controlling membership or policy, leading to internal factions. Nearly all public officials are elected from single-member districts by winning a plurality of votes. Suffrage is nearly universal for citizens aged 18 and older, except for registered felons in some states. The separation of powers, a powerful upper legislative house, and a broad Supreme Court distinguish the U.S. system from many other developed nations.

Reader's Guide

The politics of the United States are significant as a model of a constitutional federal republic with a separation of powers. The system's two-party dominance, driven by the plurality-based first-past-the-post voting system, shapes national and state-level governance. State governments have inherent powers to legislate on subjects not granted to the federal government, and local governments—including counties, municipalities, townships, school districts, and special districts—directly serve public needs. The Electoral College method for electing the president and the wide scope of power held by the Senate and Supreme Court distinguish the U.S. from many other developed countries. The Progressive Era reforms of initiatives, referendums, and recall elections exist at state and local levels but not federally. The system's structure influences political behavior, including strategic voting and internal factionalism within the major parties.

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